Blowpipe.



J. F. WILLIAMS.

BLOWPIPE.

APPLICATION FILED DEC. 20, 1909.

g s g Patented Jan. 10,1911.

3 SHEETS-SHEET 1.

Z? 15 1? v Z6 Z5 7 5 4 6 Q x5 2 J 9 J. F. WILLIAMS.

BLOWPIPE.

APPLIGATION FILED DEC. 20, 1909.

Patented J an. 10, 1911.

3 SHEETS-SHEET 2.

J. F. WILLIAMS.

\ BLOWPIPE. APPLIOATION FILED 1330.20, 1909.

981,342,, Patented Jan. 10, 1911.

3 SHEETS-SHEET 3 424 119 229755555 F1] fin/52722717 UNTTED TATE JOHN F.WILLIAMS, OF SANDUSKY, OHIO.

BLOWPIPE.

Application filed December 20, 1909.

To all whom it may concern:

Be it known that I, JoIIN F. WILLIAMS, residing at Sandusky, in thecounty of Erie and State of Ohio, have invented a certain new and usefulImprovement in Blowpipes, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings.

This invention relates to blow pipes, and especially pipes which aredesigned for the burning of acetylene with oxygen.

The objects of my invention are to pro vide a pipe of this kind whichwill be extremely eflicient and economical in operation, the length ofwhich may be conveniently changed to suit varying conditions of use,which shall possess means whereby the pipe may be conveniently relightedin case the same is extinguished, and which shall have efficient meansfor producing a cutting flame.

\Vith the above general objects in view, my invention may be definedfurther as con sisting of the combinations of elements embodied in theclaims hereto annexed and illustrated in the drawings forming a parthereof, wherein- Figure 1 represents a View, mainly in longitudinalsection, of a blow pipe constructed in accordance with my invention;Figs. 2, 3, 4 and 5 represent sectional details, respec tively,corresponding to the lines 2-2, 3 3, 44, and 5-5, of Fig. 1; Figs. (3and 7 represent longitudinal sectional views of modifications of the tipconstruction'shown in Fig. 1; Fig. 8 represents an elevation of the blowpipe and connections, the pipe proper being similar to that shown inFig. 6, and showing a modified form of the pilot burner shown in Fig. 1;Fig. 9 represents a sectional detail of the connection between thepilot.

burner of the preceding figure and its supply pipe; Fig. 10 represents adetail in plan of the pilot. burner supply; and Fig. 11 a longitudinalsectional view of the further modified form of the blow pipe tiparrangement.

Describing the parts by reference characters, 1 denotes theeasing of theblow pipe proper. said basing being generally cylindrieal in shape andprovided with a chambered front end 2 and an externally threaded rearend The front end of the casing has Specification of Letters Patent.

Patented Jan. 10, 1911.1.

Serial No. 534,138.

therein an enlarged chamber having a tapered rear end which merges witha central bore 4, which bore communicates with a chamber 5 in the rearportion of the casing and in line with the threaded end of the same.

(3 denotes a neck projecting downwardly from the casing 1 and providedwith a passageway 7 communicating with the chamber 5 and a passageway 8which communicates with the chamber formed in the front end of thecasing 1.

9 denotes the stem of an adjusting valve projecting through the threadedrear end of the casing and having an operating handle 10. Thisvalve stemis threaded into the casing, at the rear of the chamber 5, and isprovided with a conical end 11 cooperating with-the valve seat formed atthe junc tion of the chamber 5 and bore 4.

The front end of the casing 1 is flared, as shown at 12, and is providedwith an external thread 13.

14 denotes a plug which is adapted to be applied to the front end of thecasing 1. This plug is generally cylindrical in shape and has afrusto-conical rear end 15 which is adapted to be forced to a seatagainst the correspondingly shaped rear end .of the chamber 2 At itsfront end, the plug 14 is provided with a cylindrical chamber 16extending inwardly from the front end thereof. Between thefrusto-conical end 15 of the plug and the cylindrical front portionthereof, there is provided an annular recess or chamber 17 which, whenthe plug is in place in the front of the blow pipe casing, communicatesfreely with the passageway 8. The plug is provided with a bore 18extending axially therethrough and communicatmg at one end with the bore4 and at its other end with the chamber 16. The plug 14 is preferablyformed. as an integral casting and the bottom of the chamber 16 isproject.- ed forwardly into said chamber, as shown at 19, to form anozzle through which the front endof the bore 18 discharges. The plug 14is provided with an outwardly proj ecting flange 20, having its rearface tapered eomplementally to the flared front of the casing 1.

21 denotes a gland nut which is adapted to be threaded upon the frontend of the between the plug and the casing.

A series of inclined passageways 17 connect the annular chamber 17 withthe rear end or bottom of the chamber 16. These passageways convergefrom the annular port 17 toward the discharge end of the bore 18.

24 denotes a tip which is adapted to cooperate with the plug 14. Thistip is provided with a bore 25 extending therethrough and adapted toaline with the bore 18. The rear end of the tip is threaded, to adapt itfor connection to the internally threaded cylindrical end of the plug14, and the tip is provided with a flange 26 which is adapted to limitits adjustment with respect to said plug. Between this flange and thefront end of the plug there is interposed packing material 27*. Byincreasing or diminishing the thickness of this material, the width ofthe mixing chamber 27 formed between the rear end of the tip 24 and thebottom of the chamber 16 may be varied. The front end of the tip 24 isthreaded, as shown at 28, for the reception of a nozzle 29, or othertips, such as shown in'Fig. 6. The front of the tip 24 is tapered, asshown at 30, and the bore 25 discharges through the center of this taperportion. For the purpose of furnishing a cutting flame, the tip 24 maybe provided with a passageway 31' extending rearwardly from the frontend of the tip through a lateral threaded projection 32, to which theoxygen supply pipe 33 may be connected by means of a nut 34. The frontend of the nozzle 29 is tapered and forms with the front end of the tipa chamber 35, which may receive the oxygen supplied through thepassageway 31 and discharge the same in a converging. sheet through thedischarge orifice 36 into the flame produced at the end of the tip.

The neck 6 is provided at its lower end wlth an external thread which isadapted to receive a connecting sleeve 37. This connecting sleeve isprovided with a transverse bore for the pipe 42 through which oxygen issupplied to the blow plpe. The upper end of this pipe is threaded intothe base of the neck 6 and the passageway through the pipe 42 forms acontinuation of the passageway 7. The base of the neck 6 is providedwith an annular groove 8 to which a packing, ring may be applied and thelower end of the passageway 8 communicates with this groove.

The space within the casing 41 and between the same and the pipe 42 isprovided with a series of alternating wire gauze disks 43 and washers44, as shown in my latcnt #942,690, issued December 7, 1909. The purposeof this construction is to prevent the propagation of flame through theeasing 41. T

45 denotes a disk which extends across the top of the casing 41 and isprovided with a plurality of ports 46 through which acetylene may bedischarged into the chamber 40.

47 denotes a washer of suitable material surrounding the pipe 42 andinterposed between the disk 45 and the partition 38, the ports 46 beinglocated outside of the periphery of said washer.

49 denotes a passageway by means oi which communication may beestablished between the chambers 39 and 40, said passageway beingcontrolled by a regulating valve 50, said valve being of the ordinaryneedle type and reciprocably mounted in a projection 51 of the sleeve37. The valves 10 and 50 constitute adjusting valves by means of whichthe proportions of acetylene and oxygen to the blow pipe may beregulated. j

The lower end of the casing 41 is closed by a connection 52 threadedthereon. Between the bottom of this connection and the disk 53, whichextends across the bore of the casing 41, there is interposed a washer54, similar to the washer 47. This construction provides a chamber 55 atthe bottom of the casing 41, said chamber discharging acetylene into thecasing through the ports 56 in the disk 53. The connection 52 has acentral projection through which the pipe 42 passes, and a lateralprojection 57 to which the acetylene supply pipe 58 is connected. Thecentral projection 52 is threaded and a gland nut 52 having packing 52therein is threaded onto said projection.

The pipe 42 is provided with a valve 59, and the pipe 58 with a valve60-by means of which the supply of oxygen and acetylene may be turnedonto the blow pipe. At a point beyond the valve 60, that is to say,between said valve and the acetylene tank, there is provided avalve-controlled connection 61, said connection having an ordinary valve62 controlling the supply of acetylene to a branch pipe 63. This branchpipe is conveniently extended along the rear side of the casing 41,being supported by a sleeve 64 on said casing through which it extends.This pipe has a small bore and is bent rearwardly to clear the valves 10and 50. The pipe is vprovided with a plurality of spirals 65 whichnormally hold the discharge end thereof away from the blow pipe tip asufficient distance to prevent interference with the working of thepipe. At its discharge end, the pipe 63 is provided wit-h a tip 66,which may be of any approved type adapted for the burning of acetylene.This tip serves to maintain a pilot flame in such proximity to the blowpipe that, if the latter should be extinguished by merely bending thepipe 03, the tip 66 may be brought in proximity to the blow pipe tip andthe blow pipe be re-ignited. At the same time,

the flame burning at the tip 66 serves to illuminate any objects uponwhich the blow pipe may operate.

In Fig. 6 there is shown a modified form of the blow pipe illustrated inFig. 1. In this View, the blow pipe casing is indicated at 67. Thiscasing is provided with a neck (38, similar to neck (3, and has acylindrical chamber in its front end, the rear of said chamber beingshown at 69. Within its extreme front end, the casing 67 is providedwith an annular recess 70. The plug 71 cooperating with this casing issimilar to the plug 14, differing from the latter mainly in that itsrear end is not tapered, but is cylindrical and is provided with athread 72, by means of which the plug is connected to the casing. Therear portion of the plug is also provided with a flange 73, betweenwhich and the bot-tom of the chamber 69 there is interposed packing 74.An annular space is provided in front of the flange 73 for the receptionof acetylene supplied through the passageway 75. The plug is providedwith a mixing chamber 76 similar to'the mixing chamber 27, which mixinchamber is supplied through the bore 77 and convergent passageways 78which correspond respectively to the bore 18 and assageways 17 ofFig. 1. The outer cut of the plug 71 is threaded internally, as is thecase with the plug 141. It is also threaded externally, as shown at 79,for the reception of a packing nut 80, said nut having a sleeve 81adapted to project into the recess and to compact therein packingmaterial 82 83 denotes a tip which is provided with a cylindricalextension 84, by means of which it is threaded into the front of theplug 71, the tip being provided with a flange or shoulder 85 adapted toabut against the end of the plug. This tip is provided with alongitudinal bore 86 and is threaded beyond the shoulder 85, both forthe purpose of enabling it to receive another tip and for the purpose ofproviding, in effect, radiating flanges. The end of the tip 83 is shownas beveled at about an angle of 30, as shown 88 denotes a second tipwhich is provided at its rear end with an internally threaded connection89 by means of which it may be screwed upon the front end of the tip 83.This connection 87 is provided with a beveled surface 90 convergingtoward the bore 91. The inclination of the surface 90 is greater thanthe inclination of the front end of the tip 83, the inclination with thesurface 90 being shown as approximately 415. This construction providesa gripping and centering action between the front end of the tip 83 andthe cooperating portion of the tip 88. The tip 88 may be provided withthreads similar to the threads on the tip 83 and for the same purpose.

In Fig. 7 there is shown a still further modification of the blow pipe,which differs from that shown in Fig. 6, mainly in providing the plug 92with a flange 93, which flange, by the adjustment of the plugrearwardly, is adapted to compress the packing 94 which is placed in theannular recess in the front end of the casing 95. By means of a lock nut96 mounted on the threaded end of the plug and packing 97 interposedbetween said lock nut and the end of the easing 95, a tight joint isformed between the casingand the plug. In all other particulars, theplug 92 and casing are substantially the same as the corresponding partsof Fig. 6. 98 denotes a tip which is provided with a longitudinal bore99 adapted to receive a mixture of oxygen and acetylene from the'chamber100. This tip is similar to the tip 24 shown in Fig. 1 and is providedwith a shoulder or flange 101 between which and the front end of theplug 92 there is interposed packing 102. The front end of the tip isthreaded, as shown at 103, and the tip is also provided with apassageway 10a for the same purpose as the passageway 31 in the tip 24.1

In Figs. 8, 9 and 10 there is shown a modification of my invention inwhich a different construction of pilot light supply is provided than isshown in Fig. 1. in the lastmentioned figures, 105 denotes a pilot lightsupply pipe. At its outer end, this supply pipe extends through aprojection in a band 7 lar passageway 109 in any position of theconnection 110 upon said plug. The pipe section 1.12 is threaded intothe connection 110 and is provided at its end with a burner 113 of anysuitable type adapted for acetylene. The pipe 105 is preferably offsetfrom the casing 41. to accommodate the hand of the operatortherebetween. The pipe section 112 is provided wit-h. a band 114 whichenables it to be conveniently folded out of the way of'the tip 115 whenthe pilot burner is not required to relight the gases emerging from thetip. The blow pipe casing 67 and plug 79 may be identical with thecorrespondingly numbered part-s shown in Fig. 6. 111 Fig. 8 the nut 80is shown as reversed in position from that of the correspondinglynumbered nut on Fig. 6. This nut is adapt ed to abut against the end ofthe casing 67 or against the shouldered flange or nut 115* on the tip115 and provide with the latter nut means whereby the plug 79 may beconveniently removed by rotating the nut 80.

In Fig. 11 there is shown a still further modification of the tipconstruction of my blow pipe. In this View, 116 denotes the casing, saidcasing having a threaded end 117 and cylindrical chamber 118 whichcommunicates with the acetylene passageway 119. 120 denotes a plughaving a reduced threaded rear end 121 adapted to be threaded into thecasing and havin a central bore 122 adapted to register with t e oxygenbore 123. The plug is provided with a flange 124 between which and theadjacent portion of the casing there is interposed packing 125. Thefront end of the plug is cylindrical in shape and substantially sizesthe enlarged bore of the casing 116. The front end of the plug isprovided with a chamber 126, the interior of said chamber beingthreaded. 127 denotes a plurality of passageways which place the chamber126 in communication with the chamber 118. The front end of the plug issupported by a gland nut 128 threaded upon.

the front end of the casin and having an inwardly projecting flangebetween which and the front end of the casing there is interposedpacking 129. The bore 122 is extended by means of a front nozzle 130projecting into the chamber 126. For the purpose of extending the lengthof the pipe shown in this last figure, a plurality of tips may beemployed, each tip being in effect a duplicate of the plug 120. Two ofthese tips are shown at 131 and 132, and each comprises a cylindricalinternally threaded front portion which is adapted to receive anexternal cylindrical projection of another tip or plug, the rear end ofwhich is preferably of suchshape as will form a close connectionwith thenozzle portion of the plug or tip to which it may be attached. Each ofthese extensions will have a shoulder similar to shoulder 124and betweenwhich and the cylindrical end of the tip or plug by which it issupported, packing ing a tapered end 135, a central bore 136, a threadedrear end 137, and a shoulder 138, which shoulder 138 may be squared forthe reception of a wrench. Between this shoulder and the front end ofthe plug 132 packing may be interposed, as shown at 139.

It will be apparent that by increasing or diminishing the thickness ofthe packing shown at 27 102 and 133, the depth of the chamber whichreceives the mixture of oxygen and acetylene may be varied.

Among the advantages of my invention is its adaptability to practicallyall of the incidents of use. Extending the length of the blow pipe bycomparatively short interconnected extensions enables me to provide afine bore extending the length of the blow pipe, which bore would bepractically impossible of production if it were attempted to make thesamein a single long tip or extension.

Having I claim is:

1. The combination, with a blow pipe casing having a passageway, of aconduit for supplying gas to said passageway, a series of transverseperforated members in said conduit, a pipe within said conduitandcomthus described my invention, what 'municating with said casing, avalve carried by the casing and regulating the flow of fluid supplied bysaid pipe therethrough, a valve-regulated duct connecting the conduitwith the passageway in the casing, and valves controlling the supply offluid to said conduit and to said pipe.

2. The combination, with a blow pipe casing having a pair of passagewaysfor supplying gases therethrou h, valves for regulating the flow of fiuithrough said passageways, conduits communicating with said passageways,and a valve for each of said conduits.

3. The combination, with a blow pipe casinghaving a pair of passageways,a casing located outside of the blow pipe casing, a sleeve connectingsaid casings, said sleeve having a partition extending transverselythereof and providing a pair of chambers within said sleeve, one of saidchambers communicating with one of the passageways, a valve regulatingthe flow of fluid from one chamber to the other, means in said casingfor preventing the propagation of flame therethrough, a fluid supplypipe within said casing and communicating with the 120 other passagewayof the blow pipe casing valves controlling the supply of fluid to saidcasin and pi e, and a valve for regulating the flow of. uid through thepassageway with which said pipe communicates. 125

4. The combination, with a blow'pipe cas 1 ing-having a pair ofpassageways, a casing I located outside of the blow pipe casing, asleeve connecting said casings, said sleeve having a partition extendingtransversely thereof and providing a pair of chambers within saidsleeve, one of said chambers communicating with one of the passageways,a valve regulating the flow of fluid from one chamber to the other, afluid supply pipe communicating with the other passageway of the blowpipe casing, valves controlling the supply of fluid to said casing andpipe, and a valve for regulating the flow of fluid through thepassageway with which said pipe communicates.

5. The combination, with a blow pipe casing having a lateral projectionand provided with passageways extending through said projection, a pipecommunicating with one of said passageways, a sleeve connected with saidprojection and provided with a pair of chambers, one of said chamberscommunicating with the other passageway, a casing surrounding the pipeand connected to said sleeve, transverse perforated partitions in thelatter casing surrounding the pipe, a perforated disk interposed betweenthe discharge end of said casing and the adjacent chamber in the sleeve,a passageway connecting said chambers, valves regulating the flow offluid through said passageways, and additional valves controlling theflow of fluid to said passageways.

6. The combination, with a blow pipe casing having a lateral projectionand provided with passageways extending through said projection, a pipecommunicating with one of said passageways, a sleeve connected with saidprojection and provided with a pair of chambers, one of said chamberscommunieating with the other passageway, a casing surrounding the pipeand connected to said sleeve, a' passageway connecting said chambers,and valves regulating the flow of fluid. through said passageways.

7. In a blow pipe, the combination of a blowpipe casing having a lateralprojection and provided with a pair of passageways in said projection, asleeve connected with said pro ection and provided with a transversepartition providing chambers above and below the same, a casingconnected to 'the lower chambered end of the sleeve, a pipe mountedwithin said casing and extending through said partition andcommunicating with one of the passageways in the blow pipe casing,perforated partitions in the second casing, a washer surrounding thepipe beneath the partition in the sleeve, a perforated disk beneath saidwasher and extending across the top of the second casing, said. sleevebeing provided with a passageway connecting the chambers thereof, avalve for regulating the flow of fluid through said passageway, a valvefor regulating the flow of fluid through the first-mentioned passageway,and additional valves for controlling the supply of fluid to thefirst-mentioned passageways.

8. In a blow pipe, the combination of a blowpipe casing having a lateralprojection and provided with a pair of passageways in said projection, asleeve connected with said projection and provided with a transversepartition providing chambers above and below the same, a casingconnected to the lower chambered end of the sleeve, a pipe mountedwithin said casing and extending through said partition andcommunicating with one of the passageways in the blow pipe casing, saidsleeve being provided with a passageway connecting the chambers thereof,a valve for regulating the flow of fluid through said passageway, avalve for regulating the flow of fluid through the first-mentionedpassageway, and additional valves for controlling the supply of fluid tothe first mentioned passageways.

9. in a blow pipe, the combination of a blowpipe casing member having achamber and provided with passageways communicating with such chamber, aplug in said chamber and having a mixing chamber and provided with acentral bore adapted to receive fluid from one of said passageways anddischarge the same into the mixing chamber and having a plurality oflongitudinal passageways surrounding said bore and adapt ed to receivefluid from the second passageway and discharge the same into the mixingchamber independently of the central bore, means for adjusting theproportions of gases supplied through said passageways, and a tipcarried by said plug.

10. In a blow pipe, the combination of a blowpipe casing member having achamber and provided with passageways communicating with said chamber, aplug detachably connected with the casing and having a mixing chamberand provided with a central bore adapted to receive fluid from one ofsaid passageways and discharge the same into the mixing chamber andhaving a plurality of longitudinal passageways surrounding said bore andadapted to receive fluid from the second passageway and discharge thesame into the mixing chamber inde endently of the central bore, meansfor ad usting the proportions of gases supplied through saidpassageways, and a tip detachably carried by said plug.

11. In a blow pipe, the combination of a blowpipe casing member having acentrally arranged chamber and provided with a centrally arrangedpassageway provided with an adjusting valve and with a second assagewaycommunicating with said cham er, a plug having its rear end in saidchamber and provided'with a centrally arranged bore adapted toreceivefluid from the first-men tioned passageway and provided with amixing chamber into which said bore discharges, said plug having aplurality of converging passageways communicating with the passageway inthe casing and discharging into the mixing chamber, means for detachablysecuring said plug to the blow pipe casing, and a blow pipe tip having abore adapted to communicate with the mixing chamber and having meanswhereby it may be detachably secured to said plug.

12. In a blow pipe, the combination of a blowpipe casing member having acentral bore provided with an adjusting valve and a chamber at the frontend thereof communirating with said bore, said casing member having asecond passageway communicating with the said chamber, a plug detachablyconnected to said casing, said plug having a mixing chamber and providedwith a proj ection extending rearwardly from said mixing chamber andhaving a bore adapted to receive fluid from the first-mentioned bore,said plug being provided with an annular chamber communicating with thechamber in the casing and having a plurality of con verging passagewaysextending between the annular chamber and the casing chamber andsurrounding the central bore of said plug and discharging into saidmixing chamher, a tip connected to said plug and having a borecommunicating with the mixing chamher, and means whereby said tip may beadj usted with respect to the plug to vary the depth of the mixingchamber.

13. In a blow pipe, the combination of a hlowpipe casing member having acentral bore provided with an adjusting valve and a chamber at the frontend thereof communicating with said bore, said casing having a secondpassageway communicating with the said chamber, a plug detachablyconnected to said'casing, said plug having a mixing chamber and providedwith a projection extending rearwardly from said mixing chamber andhavin a bore adapted to receive fluid from the first-mentioned bore,said plug being provided with an annular chamber communicating with thechamber in the casing and having a plurality of passageways extendingbetween the annular chamber and the casing chamber and surrounding thecentral bore of the plug and discharging into said mixing chamber, and atip connected to said plug and having a bore communicating with themixing chamber.

14. In a blow pipe, the combination of a hlowpipe casing having a pairof passageways therein, a plug detachably connected to said casing andhaving a mixing chamber and provided with ducts connecting the same withsaid passageways, a tip having an extension adapted to extend into saidmixing rhamber,-and means whereby the amount of projection of suchextension may be varied to vary the depth of the mixing chamber.

15. In a blow pipe, the combination of a blowpipc casing member havingat its front end a chamber and provided with passageways communicatingtherewith, a plug detachably connected to said casing and having amixing chamber, a bore extending between said mixing chamber and one ofsaid pas-' sageways and a plurality of ducts surrounding said bore andconnect-ing the mixing chamber with the other passageway, the front thethread on the interior of the plug, a tip having an external threadadapted to fit the thread on the interior of the plug, a shouldercarried by said tip, and packing material interposed between saidshoulder and the front end of the plug.

16. The combination, with a blow pipe casing having a chamber at itsfront end and provided with a pair of passageways communicating withsaidchamber, of a plug detachably fitted to said casing, said plug having atits front end a chamber and having a centrally arranged bore extendingrearwardly from said chamber, a plurality of ducts surrounding saidbore, the front end of said plug being internally threaded, and

a member for extending the length of said pipe, said member having arearwardly projecting portion adapted to be threaded into the chamber ofthe plug.

17. In a blow pipe, the combination of a tip having a tapered end and acentral bore therethrough and provided with a duct parallel w1th saidbore and piercing said tapered end at one side of said bore, means forsupplying oxygen to said duct, and a nozzle adjustably carried by saidtip and forming therewith an annular chamber for distributing the oxygensupplied through said duct.

18. In a blow pipe, the combination of a tip having a tapered end and anaxial bore and provided with a duct extending longitudinally of said tipparallel with said bore and piercing said tapered end and adapted todischarge at one side of said bore, means for supplying oxygen to saidduct, and a nozzle carried by said tip and forming therewith an annularchamber for distributing the oxygen supplied through said duct. I

19. In a blow pipe, the combination of a tip havin a central boretherethrough and having a duct in the wall of said tip extendingrearwardly from the discharge end thereof, and a connection forsupplying oxygen to said duct.

20. In a blow pipe, the combination of a tip, means for supplying amixture of gases thereto, a burner, and means for supplying gas thereto,said burner being adjustable toward and from said tip.

21. In a blow pipe, the combination of a tip, means for supplying gasesthereto, a pipe and a pilot burner connected thereto,- said pipe havinga portion supported so as to be. movable toward and from the tip.

22. In a blow pipe, the combination of a tip, means for supplying gasesthereto, a

,with passageways, of a casing, means for supply pipe, and a pilotburner carried thereby, said supply pipe comprising two parts, and aswivel connection between said parts.

23. In a blow pipe, the combination of a casing, a tip carried thereby,regulating valves projecting rearwardly from said pipe, a burner, and apipe having a section bent around the pipe and adapted to support theburner out of operative relation to the tip.

24. The combination of a blow pipe tip, a pipe, and a burner carriedthereby, said pipe comprising a section which is movable toward and fromthe tip.

25. The combination, with a blow pipe casing having a lateral projectionprovided connecting said casing to said projection, a pipe extendingthrough the central portion of said casing and communicating with one ofsaid passageways, the chamber communieating with the other of saidpassageways, a connection detachably secured to the lower end of saidcasing and having a central threaded projection for said pipe and alsohaving a fluid supply connection, a gland nut surrounding the pipe andthreaded onto said projection, and packing interposed between saidprojection and the bottom of said nut.

26. The combination, with a blow pipe casing having a chambered frontend, of an extension for said casing, said extension having a threadedexterior and being threaded into said casing, a tip threaded into saidextension and having an integral shoulder or nut adapted to abut againstthe threaded end of the extension, and a lock nut mounted on thethreaded end of the extension and adapted to compress a packing washeragainst the end of said casing, and simultaneously lock the extension inplace.

In testimony whereof, I hereunto aflix my signature in the presence oftwo witnesses.

JOHN F. WILLIAMS. l/Vitnesses:

J. B. HULL, BRENNAN B. WEST.

